Lack of S-Opsin Expression in the African Porcupine (Hystrix cristata) and other Mammals. Is the evolutionary Persistence of S-cones a Paradox ?.
In " Normal and Defective Colour Vision". Eds. J. D. Mollon, J. Pokorny and K. Knoblauch, Oxford University Press. In press.

A mutation in the gene for the presynaptic cytomatrix protein bassoon prevents the development of photoreceptor ribbon synapses. Annual Meeting Abstract and Program Planner [on CD-ROM].
Association for Research in Vision and Ophthalmology. Abstract 354.